I am about to install my filters. I will let you all know the direction of the filters. Wish it would stop raining.
I just looked this up in the service manual. Here is the text.
"The in-cabin microfilters are marked with air flow arrows. The
end of the microfilter with the arrow should face the rear of the
vehicle. The arrows should point downward."
edit2: Like MC my filter had no screw, plus the arrows were facing up. Talk about quality control
05 Brawn Red OR 6MT, Shrock Sliders and front Bumper, Black Panther Skid Plates